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Commitments and Contingencies
 6 Months Ended
Jun. 30, 2021
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies
1
7
. Commitments and Contingencies
(a) Purchase commitments
As of June 30, 2021, the Group’s commitments related to purchase of property and equipment contracted but not yet reflected in the unaudited condensed consolidated financial statement were $28,191 and $49 which are expected to be incurred within one year and within one to two years, respectively.
 
(b) Contingencies
The Group is a party to or assignee of license and collaboration agreements that may require it to make future payments relating to milestone fees and royalties on future sales of licensed products (Note 1
5
).